Change "Show Sidebar" string

I understand How I can translate, but I am using WPML and I want it to be show filters for english and “show filters” in greek language as well
I know that the string is in \basel\inc\woocommerce.php on line 2570 but can I override it with a function? because I don’t want to change the base theme files fo future updates.
(ps. I have a child theme)

I must rephrase.
When I am in the english version of the website I see “show sidebar” and right now I am developing the greek frontend.
I want this string to be “show filters” for the english version of the site (which is hardcoded right now in the \basel\inc\woocommerce.php on line 2570) and “Φίλτρα” for the greek version of the frontend.
In order to translate the string I first need to override it from “show sidebar” to “show filters” and then translate it. Is there any way to do it with out changing in the core file (\basel\inc\woocommerce.php on line 2570)? by copying this file for example in my child theme or should I change the string directly and have it in mind to change it every time I update the theme?

I know that wpml can not change the wording that is why I asked how to override the standard string “show sidebar” with code in functions.php or by copying and altering the woocommerce.php file in my child theme folder.
Nevermind I created a function to alter strings.
For anyone who is interested in this here’s the function:

// Change the show sidebar tag
function my_altered_strings( $altered_text, $text, $domain ) {
  switch ( $altered_text ) {
    case 'Show sidebar' :
      $altered_text = __( 'Show filters', 'woocommerce' );
    break;
   }
    return $altered_text;
}
add_filter( 'gettext', 'my_altered_strings', 20, 3 );

Thank you.

Thank you very much for your time Elise.
Have a nice day.